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#11
The practical solution would be to set a static IP configuration on your PC. I have a very crappy modem/router that has a DHCP server that often fails so I've found the only solution has been to set static addresses and it works just fine. You would go under the Network and Sharing Center and then click on "Change adapter settings", right-click on your network adapter and click on "Properties" then double click on "Internet Protocol Version 4" and select where it says "Use the following IP address" and fill in the appropriate information.
If you're not sure what information to put in, you noted another computer works so simply get the information from the other computer and put it into this computer with the exception of the final octet (last part of the IP address) and change it. (Example: 172.16.0.100 would become 172.16.0.150). See if that works for you or not.